Steam boiler



April 19, 1927. 1,625,549

F. w. KRONENBERG STEAM BOILER Filed June 19. 1925 2 sheets-'met z 451 l attenua?? Patented Apr. 19,1927. 1,625,549

FREDERICK W. KRONENBER-Gr, OF PHILADELPHIA, PENNSYLVANIA.

' STEAM BOILER.

Application filed .Tune 19, 1925. Serial No. 38,268.

r1`his invention relates to steam water thereof particularly pointed out in the apboilers. pended claims. 55

In steam water boiler constructions the In the accompanying drawings,h

front and rear headers are connected to each Figure l is a longitudinal sectional view other by a plurality of tubes arranged in of a boiler embodying the present improve- Vertical series for exposure vto the .products ments, some portions which are of no conof combustion and said headers alsocommucern in the present case being shown more 60 nicate with a steam drum from which or less diagram'matical.

water is supplied to the tubes through the Fig. 2 is a transverse sectional view of a rear header and to which the generated portion of the boiler, the steamdrum being steam and remainder of the water is re` shown in elevation except for a small porturned from said tubes by way of the front tion which is broken away to better illus- 65 header, the tubes being inclined from their trate the interior thereof; point of supply at the rear header to the Fig. 3 is a view taken on the section line points at which they discharge into the 3 3 of Fig. 1;

front header. Fig. 4 is a view taken on the section line 'Under ordinary operating conditions sutii4-4 of Fig. l; 'o cient water will be supplied to all of the Fig. 5 is a detail View illustrating one of tubes but the present day tendency is to -the connections for supplying water to the. l0 force boilers so as to derive morel power lower tubes; and n from them than they are actually supposed F ig. 6 is a transverse section on the line to produce. Vhen being forced, however, 6-6 of Fig. 5. the lower row of tubes, exposed directly to Vhile the present invention is applicable the lire in the combustion chamber, become to various types of steam water boilers, the 25 very hot and practically all of the water construction of boiler used for purposes of therein is quickly converted to steam which illustration in this instance comprises front rushes upwardly through the'tubes to the and ,rear headers 10 and 11, which eom- S0 front header and drum. In the absence of municate with each other through a numbeiI an adequate supply of water to these lower of boiler tubes 12 preferably arranged in 30 tubes which are exposed directly to the vertically disposedy series and inclined for iiaine and whichV are subjected to intense wardly from the rear header to the front.

Y heat, the tubes willl become.' overheated, re- The headers may, if desired, be forinedvin si sulting in their bending, blistering or burnsections, as shown, and they each communiing. At the same time, in ordinary boiler cate with the steam drum 13 above them, construction, it is difficult to insure the'propthe front header communicating` therewith er supply of water to the lower tubes due to throughv pipes 14 and the rear header the fact that the water supply enters the through nipples 15, there being one nipple l" rear header at the top so that practically for each header section. Below the rear all of the water is sucked into the upper header, and communicating therewith, is li0 tubes, leaving insuiiicient supply for the the mud drum 16.

lower tubes. With a construction as thus far described With these diiiiculties in View the present the supply of water to the lower tube of each U5 invention seeks to provide means for ecoseries would be inadequate under the cirnoinically insuring an adequate supply of cumstances above described and to overcome water to the lower tubes of the boiler, rethis additional means are provided for suplinements of the construction consisting parplying water to a point within the rear headticularly in the adjustability and simplicity er directly opposite the rear ends of those 100 of such means. I tubes. rI`hese additional means consist of a lVith these and other objects in view, the tube or pipe 17 (termed a pipe to prevent 50 invention consists in certain detailsv of con# confusion with the tubes proper) for each struction and combinations and arrangevertical series of tubes 12, the maior porm'ents of parts, kall as will hereinafter be tion of said pipes 17 being located within 105 more fully described andthe noveli features'l the drum and header to prevent the loss of heat units as in the case ol exterior, exposed pipes. ln tact, those portions ot pipes l? not within the drum or header, are within the nipple and consequently surrounded by water llowing through the latter so that no portion ot' said pipes are exposed to the exterior air.

The upper ends oit pipes 1"? are, ot course, located below the workingV water level in drum 113 and their lower ends project down within the header 1l to discharge water l'lorinte` therethrough at a point immediately opposite the de V,ed tube, the lowern'iost tube in the present instance. ,fis the pipes i7 actually extend almost to the bottom ot the header. lor a purpose which will later appear, they are preferably 'toi-med with one or more lateral openings or ports 1S a little above their lower ends and in line with the lower tubes, the area ot the opening: or openings in each pipe being substantitlly equal to the cross section ot the pipe. Lhis also prevents the pipe directingI the water away from the tubes or towards the mud drum itl.

ln order to facilitate assembling olf the pipes LT and to permit :uljui-ilment ot the orii-.tts itl therein with respect to the lower tubes, they are adjustably secured at their upper ends in the steam drum, the interior oi which is readily acces ble through the man-holes lll, Preferably, the upper ends ot said pipes project through a horizontally disposed plate 20 in the drum and each pipe is secured in said plate by a collar 2l held on the upper extremity ot the pipe, above said plate by :i set screw This arrangement permits ot the separate adjustment of each pipe to position the discharge orilices therein in the plane ot the lower tube, this independent adjustability ot the individual pi pes being` preterrcd to an arrangement for adjusting them collectively as would be the case it the plate 20 itscl'l was adjustably supiliorted in the drum.

Due to the creation ol1A a partial vacuum in the lo 'erniost tubes on account ot the rapid conversion ol' the water to steam, water will be sucked down through pipes 17 trom drinn lil. These conditions tends to cause the water to rush towards the tubes and will, therefore` set up vilnation at the lower ends ol the tubes. To hold said ends stationary, however. suitable means are provided 'tor engaging and holding those portions ol the tubes which extend below the lowermosttubes. These means preferably consist ot two oppositcly disposed clamping* members ll whose intermediate portions are ol'tsct to receive between them the tube ends as shown in Fig. Ll. Near their ends the clamp members are ilirorided with taire-up means, such as the screw threaded bolts and nuts 24:, whereby the tube may `be securely clamped between the two members. At its opposite ends, the clamp, thus formed, engages with opposite walls ot the header section so that the pipe held cannot vibrate or oscillate` In positioning the pipes in the header sections, the clamp is lirst inserted through the hole in the header after which the pipe is inserted downwardly through the nipple l5 and its lower extremity placed in the clamp. The clam) is then tahen up by means ot the bolts and nuts A which are accessible through said holes S25.

It is not deemed necessary to give dimensions oi any ot the various parts but it will be understood that the relative diameters ot pipes l? and nipples l5 such that the clear ance between the two is suilicient to permit the ilow olf water in quantities to take care et the, upper rows ot tubes l2.

What l claim is:

l. ln a steam boiler, the combination with the liront and rear headers, tubes arranged in vertically disporY d series between the headers, and a steam drum connnunicating with both ot' said headers, ot means lor insuring,l a supply ol water 'troni .said drum to the lower portion ot the rear header and the lowernlost tube supplied trom that portion of the header, said means comprising a series ot pipes extendingl trom a point within the drum through the header to the bottom o'l the latter, the lower ond olf each pipe having lateral openings therein to discharge water laterally ot the header.

Q. In a steam boiler, the coml; ination with the front and rear headers, tubes arranged in vertically disposed series between the headers, and a steam drum communicating with both ot said headers, ot means lor insuring a supply ot water troni said drum to the lower portion ol the rear header and the lowermost tubes supplied from that portion ot' the header, said means comprising a series ot' pipes extending lrom a point within the drum through the header to the bottom ot the latter. the lower ends ol said pipes being held against vibrating and having lateral openings therein, the size ol the combined openings in each pipe being substantially equal to the cross section ot? the pipe.

3. ln a steam boiler, the combination with the trout and rear headers, tubes arranged in vertically disposed series between the headers, and a steam drum comiminicating with both ot said headers, oit supply connections tor supplying' water from the drum to the rear header at the point at which the lowermost tubes enter said header, said supply Connections extending :troni within the header to the interior ot the drum at which latter point they are adjustably secured.

4f. In a steam boiler, the combination with the front and rear headers, tubes ar ringed in vertially disposed series between the headers, and a steam drum communicating with both ot said headers, ol': supply connections extending from within the header to a point within the drum, means for adjustably securing the supply connections in position whereby their lower ends may be adjusted in the header in line with the tubes to which it is desired to supply water through said connections.

5. In a steam boiler, the combination with the front and rear headers, tubes arranged in vertically disposed series between the headers, and a steam drum communicating with both of said headers, of supply connections extending from within the header to a point within the drum; means for adjustably securing the supply connections in position whereby their lower ends may be adjusted in the header in line with the tubes to which it is desired to supply water through said connections, and means for holding the lower ends of said connections against vibration.

6. In a steam boiler, the combination with the front and rear headers, tubes arranged in vertically disposed seies between the headers, and a steam drum communicating with both of said headers, of a series or' supply connections extending from a point within the rear header upwardly through said header into the drum, the lower ends of said connections having discharge openings therein, said lower ends being held against vibration and the upper ends of said connections being adjustably secured, whereby said connections may be adjusted vertically in the header to position their discharge openings in the plane of the ends of the tube to which it is desired to supply water through said connections.

'Z'. In a steam boiler, the combination with the front and rear headers, tubes arranged in vertically disposed series between the headers, and a steam drum communicating with both of said headers, of a series of supply connections extending from a point within the rear header upwardly through said header into the drum, the lower ends oit' said connections having discharge openings therein, and the said connections being separately adjustable vertically of the rear header.

8. ln a steam boiler, the combination with l the front and rear headers, tubes arranged in vertically disposed series between the headers, and a steam drum communicating with both of said headers, of a bar mounted in said drum and a supply connect-ion for each series ot' tubes adjustably secured on said bar., said connection extending from said bar downwardly through the drum and rear header and having a lateral discharge opening near its lower end.`

9. In a steam boiler, the combination with the front and rear headers, tubes arranged Y 'FREDERICK W. KRONENBERG. 

